13512522521 has 2 divisors, whose sum is σ = 13512522522. Its totient is φ = 13512522520.

The previous prime is 13512522511. The next prime is 13512522523. The reversal of 13512522521 is 12522521531.

It is a happy number.

13512522521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10380553225 + 3131969296 = 101885^2 + 55964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13512522521 is a prime.

Together with 13512522523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13512522523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6756261260 + 6756261261.

It is an arithmetic number, because the mean of its divisors is an integer number (6756261261).

Almost surely, 2^13512522521 is an apocalyptic number.

It is an amenable number.

13512522521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13512522521 is an equidigital number, since it uses as much as digits as its factorization.

13512522521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000, while the sum is 29.

The spelling of 13512522521 in words is "thirteen billion, five hundred twelve million, five hundred twenty-two thousand, five hundred twenty-one".